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fossils can be run from the command line. This is can be very useful, especially for running simulation in the background or on a remote machine.
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### Example on Windows
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Open a command line window (in Windows, type `cmd` in the search icon). Then copy an example to the current folder (it should be your home folder such as `c:\Users\your_name`):
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```
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C:\Users\boman>xcopy AppData\Local\Programs\Fossils\models\others\dolicorhynchops mymodel /E /I
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```
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This command copies the files related to `dolicorhynchops` to a folder named `mymodel`. The go to this subfolder:
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```
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cd mymodel
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```
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From there, fossils can be run with the following command:
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```
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..\AppData\Local\Programs\Fossils\fossils.exe
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```
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Add `-h` as an argument to display the help message:
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```
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usage: fossils.exe [-h] [--nogui] [--post] [-k K] [file]
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positional arguments:
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file python file
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optional arguments:
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-h, --help show this help message and exit
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--nogui disable any graphical output
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--post display existing results
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-k K nb of threads
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```
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Running the example is as easy as:
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```
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..\AppData\Local\Programs\Fossils\fossils.exe dolicorhynchops_10k.py
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```
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The workspace folder is created in the current folder:
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```
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dir workspace\dolicorhynchops_10k
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```
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displays
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```
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Volume in drive C has no label.
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Volume Serial Number is 7461-9FF9
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Directory of C:\Users\boman\mymodel\workspace\dolicorhynchops_10k
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20/06/2022 14:09 <DIR> .
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20/06/2022 14:09 <DIR> ..
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20/06/2022 14:09 143 689 displacement_vector.msh
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20/06/2022 14:09 143 682 force_vector.msh
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20/06/2022 14:09 1 140 834 mesh.msh
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20/06/2022 14:09 82 324 mesh.opt
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20/06/2022 14:09 389 834 smooth_strain_tensor.msh
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20/06/2022 14:09 61 638 smooth_strain_xx.msh
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20/06/2022 14:09 61 638 smooth_strain_xy.msh
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20/06/2022 14:09 61 638 smooth_strain_xz.msh
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20/06/2022 14:09 61 638 smooth_strain_yy.msh
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...
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```
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Results can be reloaded by adding `--post` at the end of the command:
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```
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..\AppData\Local\Programs\Fossils\fossils.exe dolicorhynchops_10k.py --post
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```
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The last interesting option is `--nogui` which deactivates the display of the results at the end of the simulation. This option is very useful when running several tests from a script.
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